AN APPARATUS FOR ESTIMATING THE HEIGHT AT WHICH A TARGET FLIES OVER A REFLECTIVE SURFACE

摘要

There is disclosed a method for estimating the height at which a target fliesover areflective surface. The method comprises a step of emitting a signal and astep ofreceiving signals, including the emitted signal after it has been echoed bythetarget; a step of filtering the received signals; and a step of modeling adirect signal,coming directly from the target after the emitted signal has been echoed bythetarget, and of modeling an indirect signal, coming indirectly from the targetafterthe emitted signal has been echoed by the target and has been reflected by thesurface, based on reflection parameters including the amplitude of thereflectioncoefficient of the surface and/or the phase difference between the directsignal andthe indirect signal. The step of filtering estimates dynamically thereflectionparameters by use of a particle filter of a Gaussian-Sum filter.